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单词 θ68774
释义
the world > matter > chemistry > elements and compounds > metals > specific elements > promethium > [noun] (3)
illinium1926

A disused name for the element now called promethium, n.

florentium1927

A disused name for the element promethium, n.

promethium1948

A rare, radioactive, metallic chemical element of the lanthanide series, atomic number 61, which was first produced artificially in a nuclear…

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更新时间:2026/6/1 20:26:02